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Preparation method of metal and metal oxide hollow microspheres with adjustable particle sizes

A technology of hollow microspheres and oxides, applied in metal processing equipment, nickel oxide/nickel hydroxide, cobalt oxide/cobalt hydroxide, etc., can solve the problem of in-depth research on particle size regulation

Active Publication Date: 2016-10-26
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many methods for preparing hollow microspheres, the research on particle size regulation is not in-depth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation method of metallic Ni and its oxide hollow microspheres

[0021] (1) Preparation of PS microspheres

[0022] Dissolve 0.48g of PVP in 100mL ethanol solution, then pour the solution into a 250mL four-neck flask equipped with thermometer, stirrer and condenser, stir at 70℃ for 30min, add 16g monomer St and 0.16g initiator AIBN was reacted at 70℃ for 8h, washed and dried to obtain PS microspheres.

[0023] (2) Preparation of PS / Ni core-shell structure composite particles

[0024] Weigh 3g of PS microspheres and add it to 100mL of roughing solution at a constant temperature of 40°C, stirring at a constant speed for 20 minutes, washing with distilled water twice, then adding to 100mL of sensitizing solution at a constant temperature of 40°C, stirring at a constant speed for 20 minutes, and washing with distilled water twice Then it was added to 100 mL of activation solution at a constant temperature of 40°C, stirred at a constant speed for 20 minutes, washed with distil...

Embodiment 2

[0032] Preparation method of metallic Ni and its oxide hollow microspheres

[0033] (1) Preparation of PS microspheres

[0034] Weigh 0.6g of PVP and dissolve it in 100mL ethanol solution, pour the solution into a 250mL four-neck flask equipped with thermometer, stirrer and condenser, stir at 70℃ for 30min, then add 20g monomer St and 0.2g initiator AIBN, reacted at 70℃ for 10h, washed and dried to obtain PS microspheres.

[0035] (2) Preparation of PS / Ni core-shell structure composite particles

[0036] Weigh 4g of PS microspheres and add them to 100mL of roughening solution at a constant temperature of 40°C, stirring at a constant speed for 20 minutes, washing twice with distilled water, and adding to 100mL of sensitizing solution at a constant temperature of 4°C, stirring at a constant speed for 20 minutes, and washing twice with distilled water Then add it to 100mL of activation solution at a constant temperature of 40°C, stir at a constant speed for 20 minutes, wash with distill...

Embodiment 3

[0044] Preparation method of metallic Ag hollow microspheres

[0045] (1) Preparation of PS microspheres

[0046] Weigh 0.72g of PVP and dissolve it in 100mL ethanol solution, pour the solution into a 250mL four-neck flask equipped with thermometer, stirrer and condenser, stir at 70℃ for 30min, then add 24g monomer St and 0.24g initiator AIBN was reacted at 70°C for 12h, washed and dried to obtain PS microspheres.

[0047] (2) Preparation of PS / Ag core-shell structure composite particles

[0048] Weigh 2g of PS microspheres and add them to 100mL of roughing solution at a constant temperature of 40°C, stirring at a constant speed for 20min, washing twice with distilled water, and adding to 100 mL of sensitizing solution at a constant temperature of 40°C, stirring at a constant speed for 20min, and washing with distilled water 2 Add it to 100 mL of activation solution at a constant temperature of 40°C, stir at a constant speed for 20 minutes, wash with distilled water, and set aside;

...

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Abstract

The invention relates to a preparation method of metal and metal oxide hollow microspheres with adjustable particle sizes. The preparation method mainly comprises the following steps: firstly preparing micron-grade monodispersed polystyrene (PS) microspheres by a dispersion and polymerization method; secondly preparing composite particles with metal coatings by using a chemical coating method; finally removing PS kernels by adopting a solvent etching or high-temperature calcining method, to obtain metal or metal oxide microspheres with hollow structures. By changes of process parameters such as the use amount of monomers and initiators and the reaction time, the particle size of each PS microsphere can be controlled, so that adjustment of the particle sizes of the metal and metal oxide hollow microspheres can be realized.

Description

Technical field [0001] The invention relates to the synthesis of polymer microspheres, the preparation of core-shell structure PS / metal composite particles, and the preparation of metal and oxide hollow microspheres. Background technique [0002] Hollow micro-nano structural materials have very broad application prospects in the fields of catalysis, drug delivery, functional fillers, optoelectronic materials, and magnetic materials due to their high surface area and low density. There are many methods for preparing hollow micro-nano structure materials, such as hydrothermal method, spray drying method, high temperature dissolution method, template method and so on. Chang et al. [Chang Y., et al, Langmuir, 2005, 21(3):1074-1079] synthesized Cu with a diameter of 100~200nm by hydrothermal method. 2 O hollow microspheres; Zhang et al. [Zhang H G, et al, Materials Letters, 2007 ,61:4508-4511.] first synthesized multilayer Cu by hydrothermal method 2 O hollow octahedron; Sun et al. [S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C01G53/04C01G3/02C01G51/04
CPCC01G3/02C01G51/04C01G53/04B22F9/24B22F1/0655
Inventor 陈慧玉徐春菊赵培华
Owner ZHONGBEI UNIV
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